/* ── Chat bubble flotante ─────────────────────────────────────────── */

.chat-bubble {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #2563eb;
  color: #fff;
  font-size: 1.35rem;
  border: none;
  cursor: pointer;
  z-index: 9000;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.chat-bubble:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 22px rgba(37, 99, 235, 0.55);
}

/* ── Panel de chat ───────────────────────────────────────────────── */

.chat-panel {
  position: fixed;
  bottom: 88px;
  right: 24px;
  width: 320px;
  height: 440px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  box-shadow: 0 8px 32px var(--shadow);
  z-index: 8999;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  transform: scale(0.95) translateY(10px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.chat-panel.open {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: all;
}

/* ── Header ─────────────────────────────────────────────────────── */

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: #2563eb;
  color: #fff;
  flex-shrink: 0;
}

.chat-header h3 {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.chat-close-btn {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  opacity: 0.75;
  transition: opacity 0.15s;
}

.chat-close-btn:hover {
  opacity: 1;
}

/* ── Área de mensajes ────────────────────────────────────────────── */

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }

.chat-msg {
  max-width: 86%;
  padding: 8px 12px;
  border-radius: 12px;
  font-size: 0.84rem;
  line-height: 1.5;
  word-break: break-word;
}

.chat-msg.user {
  align-self: flex-end;
  background: #2563eb;
  color: #fff;
  border-bottom-right-radius: 3px;
}

.chat-msg.assistant {
  align-self: flex-start;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-bottom-left-radius: 3px;
}

.chat-typing {
  align-self: flex-start;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  border-bottom-left-radius: 3px;
  padding: 9px 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ── Input ───────────────────────────────────────────────────────── */

.chat-input-area {
  display: flex;
  gap: 8px;
  padding: 10px 12px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-card);
  flex-shrink: 0;
}

.chat-input {
  flex: 1;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 0.84rem;
  background: var(--bg-secondary);
  color: var(--text-primary);
  outline: none;
  resize: none;
  font-family: inherit;
  line-height: 1.4;
  max-height: 80px;
  overflow-y: auto;
}

.chat-input::placeholder {
  color: var(--text-muted);
}

.chat-input:focus {
  border-color: #2563eb;
}

.chat-send-btn {
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 8px;
  width: 36px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.15s;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-send-btn:hover {
  background: #1d4ed8;
}

.chat-send-btn:disabled {
  background: var(--text-muted);
  cursor: not-allowed;
}